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d8cba25d TS |
1 | /* |
2 | This file is provided under a dual BSD/GPLv2 license. When using or | |
3 | redistributing this file, you may do so under either license. | |
4 | ||
5 | GPL LICENSE SUMMARY | |
6 | Copyright(c) 2014 Intel Corporation. | |
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of version 2 of the GNU General Public License as | |
9 | published by the Free Software Foundation. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | Contact Information: | |
17 | qat-linux@intel.com | |
18 | ||
19 | BSD LICENSE | |
20 | Copyright(c) 2014 Intel Corporation. | |
21 | Redistribution and use in source and binary forms, with or without | |
22 | modification, are permitted provided that the following conditions | |
23 | are met: | |
24 | ||
25 | * Redistributions of source code must retain the above copyright | |
26 | notice, this list of conditions and the following disclaimer. | |
27 | * Redistributions in binary form must reproduce the above copyright | |
28 | notice, this list of conditions and the following disclaimer in | |
29 | the documentation and/or other materials provided with the | |
30 | distribution. | |
31 | * Neither the name of Intel Corporation nor the names of its | |
32 | contributors may be used to endorse or promote products derived | |
33 | from this software without specific prior written permission. | |
34 | ||
35 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
36 | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
37 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
38 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
39 | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
40 | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
41 | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
42 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
43 | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
44 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
45 | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
46 | */ | |
47 | #include <linux/module.h> | |
48 | #include <linux/mutex.h> | |
49 | #include <linux/slab.h> | |
50 | #include <linux/fs.h> | |
51 | #include <linux/bitops.h> | |
52 | #include <linux/pci.h> | |
53 | #include <linux/cdev.h> | |
54 | #include <linux/uaccess.h> | |
5d26a105 | 55 | #include <linux/crypto.h> |
d8cba25d TS |
56 | |
57 | #include "adf_accel_devices.h" | |
58 | #include "adf_common_drv.h" | |
59 | #include "adf_cfg.h" | |
60 | #include "adf_cfg_common.h" | |
61 | #include "adf_cfg_user.h" | |
62 | ||
63 | #define DEVICE_NAME "qat_adf_ctl" | |
64 | ||
65 | static DEFINE_MUTEX(adf_ctl_lock); | |
66 | static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg); | |
67 | ||
68 | static const struct file_operations adf_ctl_ops = { | |
69 | .owner = THIS_MODULE, | |
70 | .unlocked_ioctl = adf_ctl_ioctl, | |
71 | .compat_ioctl = adf_ctl_ioctl, | |
72 | }; | |
73 | ||
74 | struct adf_ctl_drv_info { | |
75 | unsigned int major; | |
76 | struct cdev drv_cdev; | |
77 | struct class *drv_class; | |
78 | }; | |
79 | ||
754a90d3 | 80 | static struct adf_ctl_drv_info adf_ctl_drv; |
d8cba25d TS |
81 | |
82 | static void adf_chr_drv_destroy(void) | |
83 | { | |
754a90d3 AB |
84 | device_destroy(adf_ctl_drv.drv_class, MKDEV(adf_ctl_drv.major, 0)); |
85 | cdev_del(&adf_ctl_drv.drv_cdev); | |
86 | class_destroy(adf_ctl_drv.drv_class); | |
87 | unregister_chrdev_region(MKDEV(adf_ctl_drv.major, 0), 1); | |
d8cba25d TS |
88 | } |
89 | ||
90 | static int adf_chr_drv_create(void) | |
91 | { | |
92 | dev_t dev_id; | |
93 | struct device *drv_device; | |
94 | ||
95 | if (alloc_chrdev_region(&dev_id, 0, 1, DEVICE_NAME)) { | |
96 | pr_err("QAT: unable to allocate chrdev region\n"); | |
97 | return -EFAULT; | |
98 | } | |
99 | ||
754a90d3 AB |
100 | adf_ctl_drv.drv_class = class_create(THIS_MODULE, DEVICE_NAME); |
101 | if (IS_ERR(adf_ctl_drv.drv_class)) { | |
d8cba25d TS |
102 | pr_err("QAT: class_create failed for adf_ctl\n"); |
103 | goto err_chrdev_unreg; | |
104 | } | |
754a90d3 AB |
105 | adf_ctl_drv.major = MAJOR(dev_id); |
106 | cdev_init(&adf_ctl_drv.drv_cdev, &adf_ctl_ops); | |
107 | if (cdev_add(&adf_ctl_drv.drv_cdev, dev_id, 1)) { | |
d8cba25d TS |
108 | pr_err("QAT: cdev add failed\n"); |
109 | goto err_class_destr; | |
110 | } | |
111 | ||
754a90d3 AB |
112 | drv_device = device_create(adf_ctl_drv.drv_class, NULL, |
113 | MKDEV(adf_ctl_drv.major, 0), | |
d8cba25d | 114 | NULL, DEVICE_NAME); |
65fafbe9 | 115 | if (IS_ERR(drv_device)) { |
d8cba25d TS |
116 | pr_err("QAT: failed to create device\n"); |
117 | goto err_cdev_del; | |
118 | } | |
119 | return 0; | |
120 | err_cdev_del: | |
754a90d3 | 121 | cdev_del(&adf_ctl_drv.drv_cdev); |
d8cba25d | 122 | err_class_destr: |
754a90d3 | 123 | class_destroy(adf_ctl_drv.drv_class); |
d8cba25d TS |
124 | err_chrdev_unreg: |
125 | unregister_chrdev_region(dev_id, 1); | |
126 | return -EFAULT; | |
127 | } | |
128 | ||
129 | static int adf_ctl_alloc_resources(struct adf_user_cfg_ctl_data **ctl_data, | |
130 | unsigned long arg) | |
131 | { | |
132 | struct adf_user_cfg_ctl_data *cfg_data; | |
133 | ||
134 | cfg_data = kzalloc(sizeof(*cfg_data), GFP_KERNEL); | |
135 | if (!cfg_data) | |
136 | return -ENOMEM; | |
137 | ||
138 | /* Initialize device id to NO DEVICE as 0 is a valid device id */ | |
139 | cfg_data->device_id = ADF_CFG_NO_DEVICE; | |
140 | ||
141 | if (copy_from_user(cfg_data, (void __user *)arg, sizeof(*cfg_data))) { | |
142 | pr_err("QAT: failed to copy from user cfg_data.\n"); | |
143 | kfree(cfg_data); | |
144 | return -EIO; | |
145 | } | |
146 | ||
147 | *ctl_data = cfg_data; | |
148 | return 0; | |
149 | } | |
150 | ||
151 | static int adf_add_key_value_data(struct adf_accel_dev *accel_dev, | |
152 | const char *section, | |
153 | const struct adf_user_cfg_key_val *key_val) | |
154 | { | |
155 | if (key_val->type == ADF_HEX) { | |
156 | long *ptr = (long *)key_val->val; | |
157 | long val = *ptr; | |
158 | ||
159 | if (adf_cfg_add_key_value_param(accel_dev, section, | |
160 | key_val->key, (void *)val, | |
161 | key_val->type)) { | |
66550304 AB |
162 | dev_err(&GET_DEV(accel_dev), |
163 | "failed to add hex keyvalue.\n"); | |
d8cba25d TS |
164 | return -EFAULT; |
165 | } | |
166 | } else { | |
167 | if (adf_cfg_add_key_value_param(accel_dev, section, | |
168 | key_val->key, key_val->val, | |
169 | key_val->type)) { | |
66550304 AB |
170 | dev_err(&GET_DEV(accel_dev), |
171 | "failed to add keyvalue.\n"); | |
d8cba25d TS |
172 | return -EFAULT; |
173 | } | |
174 | } | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static int adf_copy_key_value_data(struct adf_accel_dev *accel_dev, | |
179 | struct adf_user_cfg_ctl_data *ctl_data) | |
180 | { | |
181 | struct adf_user_cfg_key_val key_val; | |
182 | struct adf_user_cfg_key_val *params_head; | |
183 | struct adf_user_cfg_section section, *section_head; | |
184 | ||
185 | section_head = ctl_data->config_section; | |
186 | ||
187 | while (section_head) { | |
188 | if (copy_from_user(§ion, (void __user *)section_head, | |
189 | sizeof(*section_head))) { | |
66550304 AB |
190 | dev_err(&GET_DEV(accel_dev), |
191 | "failed to copy section info\n"); | |
d8cba25d TS |
192 | goto out_err; |
193 | } | |
194 | ||
195 | if (adf_cfg_section_add(accel_dev, section.name)) { | |
66550304 AB |
196 | dev_err(&GET_DEV(accel_dev), |
197 | "failed to add section.\n"); | |
d8cba25d TS |
198 | goto out_err; |
199 | } | |
200 | ||
176155da | 201 | params_head = section.params; |
d8cba25d TS |
202 | |
203 | while (params_head) { | |
204 | if (copy_from_user(&key_val, (void __user *)params_head, | |
205 | sizeof(key_val))) { | |
66550304 AB |
206 | dev_err(&GET_DEV(accel_dev), |
207 | "Failed to copy keyvalue.\n"); | |
d8cba25d TS |
208 | goto out_err; |
209 | } | |
210 | if (adf_add_key_value_data(accel_dev, section.name, | |
211 | &key_val)) { | |
212 | goto out_err; | |
213 | } | |
214 | params_head = key_val.next; | |
215 | } | |
216 | section_head = section.next; | |
217 | } | |
218 | return 0; | |
219 | out_err: | |
220 | adf_cfg_del_all(accel_dev); | |
221 | return -EFAULT; | |
222 | } | |
223 | ||
224 | static int adf_ctl_ioctl_dev_config(struct file *fp, unsigned int cmd, | |
225 | unsigned long arg) | |
226 | { | |
227 | int ret; | |
228 | struct adf_user_cfg_ctl_data *ctl_data; | |
229 | struct adf_accel_dev *accel_dev; | |
230 | ||
231 | ret = adf_ctl_alloc_resources(&ctl_data, arg); | |
232 | if (ret) | |
233 | return ret; | |
234 | ||
235 | accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id); | |
236 | if (!accel_dev) { | |
237 | ret = -EFAULT; | |
238 | goto out; | |
239 | } | |
240 | ||
241 | if (adf_dev_started(accel_dev)) { | |
242 | ret = -EFAULT; | |
243 | goto out; | |
244 | } | |
245 | ||
246 | if (adf_copy_key_value_data(accel_dev, ctl_data)) { | |
247 | ret = -EFAULT; | |
248 | goto out; | |
249 | } | |
250 | set_bit(ADF_STATUS_CONFIGURED, &accel_dev->status); | |
251 | out: | |
252 | kfree(ctl_data); | |
253 | return ret; | |
254 | } | |
255 | ||
256 | static int adf_ctl_is_device_in_use(int id) | |
257 | { | |
258 | struct list_head *itr, *head = adf_devmgr_get_head(); | |
259 | ||
260 | list_for_each(itr, head) { | |
261 | struct adf_accel_dev *dev = | |
262 | list_entry(itr, struct adf_accel_dev, list); | |
263 | ||
264 | if (id == dev->accel_id || id == ADF_CFG_ALL_DEVICES) { | |
265 | if (adf_devmgr_in_reset(dev) || adf_dev_in_use(dev)) { | |
66550304 AB |
266 | dev_info(&GET_DEV(dev), |
267 | "device qat_dev%d is busy\n", | |
268 | dev->accel_id); | |
d8cba25d TS |
269 | return -EBUSY; |
270 | } | |
271 | } | |
272 | } | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static int adf_ctl_stop_devices(uint32_t id) | |
277 | { | |
278 | struct list_head *itr, *head = adf_devmgr_get_head(); | |
279 | int ret = 0; | |
280 | ||
281 | list_for_each(itr, head) { | |
282 | struct adf_accel_dev *accel_dev = | |
283 | list_entry(itr, struct adf_accel_dev, list); | |
284 | if (id == accel_dev->accel_id || id == ADF_CFG_ALL_DEVICES) { | |
285 | if (!adf_dev_started(accel_dev)) | |
286 | continue; | |
287 | ||
288 | if (adf_dev_stop(accel_dev)) { | |
66550304 AB |
289 | dev_err(&GET_DEV(accel_dev), |
290 | "Failed to stop qat_dev%d\n", id); | |
d8cba25d | 291 | ret = -EFAULT; |
22e4dda0 AB |
292 | } else { |
293 | adf_dev_shutdown(accel_dev); | |
d8cba25d TS |
294 | } |
295 | } | |
296 | } | |
297 | return ret; | |
298 | } | |
299 | ||
300 | static int adf_ctl_ioctl_dev_stop(struct file *fp, unsigned int cmd, | |
301 | unsigned long arg) | |
302 | { | |
303 | int ret; | |
304 | struct adf_user_cfg_ctl_data *ctl_data; | |
305 | ||
306 | ret = adf_ctl_alloc_resources(&ctl_data, arg); | |
307 | if (ret) | |
308 | return ret; | |
309 | ||
310 | if (adf_devmgr_verify_id(ctl_data->device_id)) { | |
311 | pr_err("QAT: Device %d not found\n", ctl_data->device_id); | |
312 | ret = -ENODEV; | |
313 | goto out; | |
314 | } | |
315 | ||
316 | ret = adf_ctl_is_device_in_use(ctl_data->device_id); | |
317 | if (ret) | |
318 | goto out; | |
319 | ||
320 | if (ctl_data->device_id == ADF_CFG_ALL_DEVICES) | |
321 | pr_info("QAT: Stopping all acceleration devices.\n"); | |
322 | else | |
323 | pr_info("QAT: Stopping acceleration device qat_dev%d.\n", | |
324 | ctl_data->device_id); | |
325 | ||
326 | ret = adf_ctl_stop_devices(ctl_data->device_id); | |
327 | if (ret) | |
328 | pr_err("QAT: failed to stop device.\n"); | |
329 | out: | |
330 | kfree(ctl_data); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | static int adf_ctl_ioctl_dev_start(struct file *fp, unsigned int cmd, | |
335 | unsigned long arg) | |
336 | { | |
337 | int ret; | |
338 | struct adf_user_cfg_ctl_data *ctl_data; | |
339 | struct adf_accel_dev *accel_dev; | |
340 | ||
341 | ret = adf_ctl_alloc_resources(&ctl_data, arg); | |
342 | if (ret) | |
343 | return ret; | |
344 | ||
345 | accel_dev = adf_devmgr_get_dev_by_id(ctl_data->device_id); | |
346 | if (!accel_dev) { | |
347 | pr_err("QAT: Device %d not found\n", ctl_data->device_id); | |
348 | ret = -ENODEV; | |
349 | goto out; | |
350 | } | |
351 | ||
352 | if (!adf_dev_started(accel_dev)) { | |
66550304 AB |
353 | dev_info(&GET_DEV(accel_dev), |
354 | "Starting acceleration device qat_dev%d.\n", | |
355 | ctl_data->device_id); | |
22e4dda0 AB |
356 | ret = adf_dev_init(accel_dev); |
357 | if (!ret) | |
358 | ret = adf_dev_start(accel_dev); | |
d8cba25d | 359 | } else { |
66550304 AB |
360 | dev_info(&GET_DEV(accel_dev), |
361 | "Acceleration device qat_dev%d already started.\n", | |
362 | ctl_data->device_id); | |
d8cba25d TS |
363 | } |
364 | if (ret) { | |
66550304 AB |
365 | dev_err(&GET_DEV(accel_dev), "Failed to start qat_dev%d\n", |
366 | ctl_data->device_id); | |
d8cba25d | 367 | adf_dev_stop(accel_dev); |
22e4dda0 | 368 | adf_dev_shutdown(accel_dev); |
d8cba25d TS |
369 | } |
370 | out: | |
371 | kfree(ctl_data); | |
372 | return ret; | |
373 | } | |
374 | ||
375 | static int adf_ctl_ioctl_get_num_devices(struct file *fp, unsigned int cmd, | |
376 | unsigned long arg) | |
377 | { | |
378 | uint32_t num_devices = 0; | |
379 | ||
380 | adf_devmgr_get_num_dev(&num_devices); | |
381 | if (copy_to_user((void __user *)arg, &num_devices, sizeof(num_devices))) | |
382 | return -EFAULT; | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | static int adf_ctl_ioctl_get_status(struct file *fp, unsigned int cmd, | |
388 | unsigned long arg) | |
389 | { | |
390 | struct adf_hw_device_data *hw_data; | |
391 | struct adf_dev_status_info dev_info; | |
392 | struct adf_accel_dev *accel_dev; | |
393 | ||
394 | if (copy_from_user(&dev_info, (void __user *)arg, | |
395 | sizeof(struct adf_dev_status_info))) { | |
396 | pr_err("QAT: failed to copy from user.\n"); | |
397 | return -EFAULT; | |
398 | } | |
399 | ||
400 | accel_dev = adf_devmgr_get_dev_by_id(dev_info.accel_id); | |
ed8ccaef | 401 | if (!accel_dev) |
d8cba25d | 402 | return -ENODEV; |
ed8ccaef | 403 | |
d8cba25d TS |
404 | hw_data = accel_dev->hw_device; |
405 | dev_info.state = adf_dev_started(accel_dev) ? DEV_UP : DEV_DOWN; | |
406 | dev_info.num_ae = hw_data->get_num_aes(hw_data); | |
407 | dev_info.num_accel = hw_data->get_num_accels(hw_data); | |
408 | dev_info.num_logical_accel = hw_data->num_logical_accel; | |
409 | dev_info.banks_per_accel = hw_data->num_banks | |
410 | / hw_data->num_logical_accel; | |
411 | strlcpy(dev_info.name, hw_data->dev_class->name, sizeof(dev_info.name)); | |
412 | dev_info.instance_id = hw_data->instance_id; | |
413 | dev_info.type = hw_data->dev_class->type; | |
414 | dev_info.bus = accel_to_pci_dev(accel_dev)->bus->number; | |
415 | dev_info.dev = PCI_SLOT(accel_to_pci_dev(accel_dev)->devfn); | |
416 | dev_info.fun = PCI_FUNC(accel_to_pci_dev(accel_dev)->devfn); | |
417 | ||
418 | if (copy_to_user((void __user *)arg, &dev_info, | |
419 | sizeof(struct adf_dev_status_info))) { | |
66550304 | 420 | dev_err(&GET_DEV(accel_dev), "failed to copy status.\n"); |
d8cba25d TS |
421 | return -EFAULT; |
422 | } | |
423 | return 0; | |
424 | } | |
425 | ||
426 | static long adf_ctl_ioctl(struct file *fp, unsigned int cmd, unsigned long arg) | |
427 | { | |
428 | int ret; | |
429 | ||
430 | if (mutex_lock_interruptible(&adf_ctl_lock)) | |
431 | return -EFAULT; | |
432 | ||
433 | switch (cmd) { | |
434 | case IOCTL_CONFIG_SYS_RESOURCE_PARAMETERS: | |
435 | ret = adf_ctl_ioctl_dev_config(fp, cmd, arg); | |
436 | break; | |
437 | ||
438 | case IOCTL_STOP_ACCEL_DEV: | |
439 | ret = adf_ctl_ioctl_dev_stop(fp, cmd, arg); | |
440 | break; | |
441 | ||
442 | case IOCTL_START_ACCEL_DEV: | |
443 | ret = adf_ctl_ioctl_dev_start(fp, cmd, arg); | |
444 | break; | |
445 | ||
446 | case IOCTL_GET_NUM_DEVICES: | |
447 | ret = adf_ctl_ioctl_get_num_devices(fp, cmd, arg); | |
448 | break; | |
449 | ||
450 | case IOCTL_STATUS_ACCEL_DEV: | |
451 | ret = adf_ctl_ioctl_get_status(fp, cmd, arg); | |
452 | break; | |
453 | default: | |
1a84db56 | 454 | pr_err("QAT: Invalid ioctl\n"); |
d8cba25d TS |
455 | ret = -EFAULT; |
456 | break; | |
457 | } | |
458 | mutex_unlock(&adf_ctl_lock); | |
459 | return ret; | |
460 | } | |
461 | ||
462 | static int __init adf_register_ctl_device_driver(void) | |
463 | { | |
464 | mutex_init(&adf_ctl_lock); | |
465 | ||
d8cba25d TS |
466 | if (adf_chr_drv_create()) |
467 | goto err_chr_dev; | |
468 | ||
469 | if (adf_init_aer()) | |
470 | goto err_aer; | |
471 | ||
472 | if (qat_crypto_register()) | |
473 | goto err_crypto_register; | |
474 | ||
475 | return 0; | |
476 | ||
477 | err_crypto_register: | |
478 | adf_exit_aer(); | |
479 | err_aer: | |
480 | adf_chr_drv_destroy(); | |
481 | err_chr_dev: | |
d8cba25d TS |
482 | mutex_destroy(&adf_ctl_lock); |
483 | return -EFAULT; | |
484 | } | |
485 | ||
486 | static void __exit adf_unregister_ctl_device_driver(void) | |
487 | { | |
488 | adf_chr_drv_destroy(); | |
489 | adf_exit_aer(); | |
490 | qat_crypto_unregister(); | |
ed8ccaef | 491 | adf_clean_vf_map(false); |
d8cba25d TS |
492 | mutex_destroy(&adf_ctl_lock); |
493 | } | |
494 | ||
495 | module_init(adf_register_ctl_device_driver); | |
496 | module_exit(adf_unregister_ctl_device_driver); | |
497 | MODULE_LICENSE("Dual BSD/GPL"); | |
498 | MODULE_AUTHOR("Intel"); | |
499 | MODULE_DESCRIPTION("Intel(R) QuickAssist Technology"); | |
5d26a105 | 500 | MODULE_ALIAS_CRYPTO("intel_qat"); |
551d7ed2 | 501 | MODULE_VERSION(ADF_DRV_VERSION); |